Padlock



April 15 1924.

Y- Q. CALDWELL PADLOGK Filed March 14, 1923 2 Sheets-Sheet l I l/V'I/E/VTOR K Q Guava 51.1

Arm/mars April 15 (1924.,

Y. Q. CALDWELL Filed March 14 192s PADLOCK 2 Sheets-Shet Z man/um Patented Apr 15 11246 STAT a a; la

YANCEY Q. CALDWELL, OF EARIS, TENNESSEE.

PADLOCK.

Application filed March 14, 1923. Serial No. 625,112.

T 0 all whom it ma concern:

Be it known that YANOEY Q. CALDWELL, a citizen of the United States, and a resident of Paris, in the county of Henry and State of Tennessee, have invented certain new and useful Improvements in Padlocks, of which the following is a specification.

This invention relates to an improvement in pad locks especially adapted for use with railway switch stands although also adapted for general use.

The object of the invention is to provide a pad look by which an extremely strong and secure locking action may be attained the lock being so organized and of such construction that the locking bolt is firmly held in both locked and unlocked position, the pad lock being at the same time of compact structure and having its operating parts entirely housed so as to protect such parts from the weather and preclude any possibility of their manipulation by an unauthorized person through susceptible of ready operation by authorized persons.

Other objects and advantages of the invention reside in certain novel features of the construction, combination and arrangement of parts which will be hereinafter more fully described and particularly pointed out in the appended claims, reference being had to the accompanying drawings forming part of this specification, and in which:

Figure 1 is a group view in perspective, showing the look, its key and a staple with which it is adapted to cooperate;

Figure 2 is a view of the pad lock in elevation with the front plate thereof removed;

Figure 3 is a view similar to Figure 2 with the front plate removed and also with the rotatable actuating disk removed;

Figure 4 is a group view in perspective,

- showing the parts of the lock prior to as i of actuating sembly;

Figure 5 is a view in section, taken approximately on line 55 of Figure 2 but showing the cover plate in position;

Figure 6 is a View in perspective, showing a slightly modified form of actuating disk;

Figure 7 is a similar view of a slightly modified form of bolt adapted to be used with the disk of Figure 6; I

Figure 8 is a view in elevation similar to Figure 2 but showing the modified forms disk and bolt of Figures 6 and 7 in assembly; and

Figure 9 is a detail view, in bottom plan,

of the bolt used with the form of the invention shown in Figures 1 to 5.

Referring to the drawings wherein for the sake of illustration is shown the preferred embodiment of the invention, the numeral 10 designates the casing for the lock which may be a solid casing of metal formed or machined with two chambers 11 and 12 of substantially cylindrical form. The lock casing 11 is also provided at one end with a transverse opening 13 which extends through the chamber 11 and from a point approximately at the center of the chamber entirely across the chamber and through the adjacent end of the casing, as clearly shown in the drawings. A flange 14 is integrally formed with the casing and extends around the opening 13, as shown to advantage in Figures 2, 3 and a. -This flange and adjacent walls of the chamber 11 define a guideway or slideway 15 in which an arcuate bolt 16 is slidably arranged. It is to be noted that one end of the slide-Way 15 is open as at 17 so that the bolt may be projected across the outer end of the opening 13 as will hereinafter more fully appear and the other end of the slideway 15 is closed by a partition or wall 18 preferably formed integral with the casing and flange 14. On the opposite side of the partition 18 from the slideway 15, a bolt seat 19 is provided.

In the chamber 12 a base plate 20 is fitted and is held against rotation by means of a projection or lug 21 rigid or integrally 'formed with the casing 10 and fitting in a recess or notch 22 provided in the periphery of the plate 20. The plate 20 is provided with radial guideways 23 which are disposed diametrically opposite and which slidably receive locking dogs 24:. These locking dogs 24: have a snug working or sliding fit in the guideways 23 and preferably they are of the same thickness as this plate 20 so as to be firmly held and reinforced in operation. These locking dogs 23 are provided at their forward ends with upstanding cams 26 and adjacent the cams the do s have formed therein transverse grooves 2%, all of which serve a purpose which will presently be understood The base plate 20 is provided with an annular groove 28 interrupted of course by the guideways 23. Also this base plate is provided with a central annular recess 29 within the space circumscribed by the groove 28 and from the center of the space 29 a key post 30 extends. Between the recess 29 and groove 28 there is thus provided a flange, indicated at 31, and this flange serves to limit the inward movement of the dogs 24 in the assembly, the dogs being spring pressed inwardly by means of springs 32 received in sockets 33 provided therefor in the dogs 24 and engaging the inner end of the sockets at one end and the opposed portion of the wall of the lock casing at the opposite ends.

An actuating or controlling disk 35 is superposed upon the base plate 20 in the compartment 12 and is provided with a central opening 36 through which the key post 30 extends and with intersecting key slots 37 and 38 which are arranged at right angles and intersect at the opening 36. This disk 35 is a working fit in the compartment 12 so as to be freely rotatable therein and it has the marginal portion of its inner face plane and fiat, as at 39, so as to engage a corresponding face 39 on the base 20 to thereby insure a smooth and easy movement of the disk. On the inner face of the disk 35 there is provided an annular flange 40 having notches 41 provided at angular intervals of 90 therein, these notches 41 being arranged in radial alinement with the key slots 37 and 38, as shown in the drawings. In the assembly the flange 40 fits down into the annular groove 28 and the notches 41 receive the locking dogs 24 so that these looking dogs engaging the walls of the notches 41 prevent rotation of the disk 35. \Vhen however the locking dogs are retracted or pushed radially outward the transverse grooves will be brought into position to accommodate the flange 40 so as to permit rotary movement of the disk 35. Diametrically opposite lugs 45 are integrally formed with the disk and serve as abutments for engagement with the key whereby the disk may be rotated. Pins 46 are arranged intermediate the disk and serve as obstructions for preventing engagement of any key except the one provided with the proper wards with the lugs 45.

Means is provided for transmitting the motion of the actuating disk 35 to the bolt 16 and for constraining the bolt 16 against all motion except that imparted to it from the disk This means preferably comprises a link 50 having integral or rigidly connected pivot pins or trunnions 51 and formed at its opposite ends. The bolt 16 is provided with a recess 53 extending from its peripheral face and intermediate its up per and lower faces transversely across the belt for a suflicient distance to provide adequate clearance to accommodate movement of the link and this bolt 16 is further provided with an entering slot 54 for the trunnion *.;vhich extends from the lower face of neeaaes the bolt into the recess 53 and with a socket 55 for the reception of this trunnion, the socket 55 extending from the recess 23 to the upper face of the bolt and being arranged above the entering slot 54. The socket 55 and the trunnion 51 when engaged afford a pivotal connection between the link and the bolt. The disk 35 is cut away or recessed on its underside as at 57 and is provided with a socket 58 at one end of said recess for the reception of the trunnion 52 whereby the link 50 is also pi votally connected to the disk 35 and the proper clearance is provided for accommodating the movement of the link. As shown in Figure 4 the socket 58 extends from the recess 57 through the upper face of the disk and the recess 57 is enlarged as at 57 below the socket 58 to facilitate assembly. The link 50 extends from the disk 35 to the bolt through an opening 59 provided there'lor in the lock casing between the chambers 11 and 12.

After the parts have been assembled in the lock casing in the manner described a base plate or cover plate 60 is placed over the open side of the casing so as to cover all of the operating parts therein and to be secured therein by means of screws or other fastening means 61 extending through openings provided therein and having engagement with the lock casing 10.

The lock is operated by means of a key 65 which in the embodiment shown includes a shank 66 having wings or blades 67 grooved or provided with wards 68, these wards accommodating the flange 31 and the pins 46 which constitute obstructions to prevent operation of the look by an unauthorized person or by any key except that which is especially constructed and intended to be used to operate the lock. The cover plate 60 is provided with a single key opening or slot 70 and the key post 30 extends through this key-hole slot 70. The end of the key 65 is of course suitably socketed to receive the key post 30: When the key 65 is inserted in the lock and is turned its wing 67 will first engage the cams 26 and coact withthese cams to push the locking dogs 24 radially outward in their guideways 23 against the action of the springs 32 to bring the transverse grooves 27 of these dogs into position to accommodate the flange 40 of the disk 35. While the key thus coacts with the cams to so position the slots 27 of the dogs it comes into engagement with the lugs 45 of the disk and as the key is turned its motion will be transmitted to the disk 35 through these lugs Such turn; ing or rotary movement of the disk 35 will rotate the flange 40 into the transverse grooves 27 of the dogs so that after the key has been disengaged from the cams 26 of the dogs these dogs will still be held in posiincense tion to permit of proper movement of the disk by the action of the flange 10. 'As the disk 35 is turned its movement will be transmitted to the bolt 16 through the link 50 and the bolt will be retracted or thrown to locking position accordingly as the key is turned to lock or unlock the pad look. When the bolt 16 is moved to locked position it completely obstructs the outer end of the opening 13 and thus provides "for the complete enclosure of the staple or other elements with which it is engaged. On the other hand when the bolt has been contracted it is entirely contained in the casing 10, its outer face 16 serving to close the opening into the guideway 15.

In Figures 6, 7 and 8 there is shown a slightly modified form of the invention. This modified form is identical in all respects with the embodiment hereinabove de scribed except as to the manner inwhich the link is connected to the actuating disk and to the bolt. The only respect in which the construction proper of the actuating disk differs from that shown in Figures 1 to 5 is in the provision of the key slot. In lieu of providing two intersecting slots only one key slot is provided and is designated at 75. In the embodiment shown in Figures 1 to 5 the link 50 is shown as connected to the under side of the bolt and to the under side of the actuating disk. In the form or" the invention shown in Figures 6 and 8 this link is connected to the upper side of the disk so that the upper part of the disk 7% is cut away, as at 7 6 and socketed, as at 77, for the reception of one of the trunnions of the link. Also the upper side of the bolt 79 corresponding to the bolt 16 is cut away or recessed as at 80 and is socketed, as at 81, for the reception of the other trunnion of the link, the link being of identical construction as the link 50. The operation of this form of the invention is identical in all respect to that shown in Figures 1 to 5 and the only difierence resides in the manner in which the parts are assembled.

It is of course to be understood that by providing only one key slot in the actuating disk that the key can only be withdrawn in the locking position of the bolt and obviously this expedient may be resorted to in the form shown in Figures 1 to 5 inclusive, if desired.

It is also to be understood that by slightly varying the size or arrangement of the obstruction of the lock and the wards of the key the locks may be provided in series. Moreover drain holes may be placed in the lock casing and other parts if desired.

While there is herein shown and described several embodiments of the invention, obviously various changes in size, shape and arrangement of parts may be resorted to without departing from the spirit of the invention and scope of the subjoined claims.

I claim:

1. In a lock of the character described, a casing having a chamber formed with an arcuate guideway and having a bolt seat, an arcuate bolt movable in said guideway and cooperable with said bolt seat, said casing having a transverse opening intersecting said chamber, said casing also having a second chamber adjacent said first chamber, a

- base plate fitted in said second chamber and having radial guideways, spring pressed locking dogs mounted in said guideways, and having locking cams and transverse grooves, an actuating disk superposed on said base plate and having a locking flange provided with angularly spaced notches receiving and adapted to permit of radial movement of the locking dogs, the transverse grooves of the locking dogs accommodating said locking flange in the unlocked position of the dogs, the walls of the notches in said locking flange engaging the dogs in the locked position thereof, means for transmitting the motion of the disk to the bolt, said disk having key-hole slots therein and being provided with inwardly extending lugs constituting abutments for a key, said disk and said base plate being provided with obstructions constituting wards.

2. In a lockot the character described, a casing having a chamber formed with an arcuate guideway and having a bolt seat, an arcuate bolt movable in said guideway and cooperable with said bolt seat, said casing having a transverse opening intersecting said chamber, said casing also having a second chamber adjacent said first chan1- her, a base plate fitted in said second chamher and having radial guideways, spring pressed locking dogs mounted in said guideways, and having locking cams and transverse grooves, an actuating disk superposed on said base plate and having a locking flange provided with angularly spaced notches receiving and adapted to permit of radial movement of the locking dogs, the transverse grooves of the locking dogs accommodating said locking flange in the unlocked position of the dogs, the walls of the notches in said locking flange engaging the dogs in the locked position thereof, and means for transmitting the motion of the disk to the bolt.

3. In a lock of the character described, a lock casing, a bolt mounted therein, a base plate fitted in said casing and having guideways therein, spring pressed locking dogs operatin in said guideways, a rotatable actuating disk superposed on said base plate and having a locking flange, said locking flange having notches, the walls of the notches being engaged with the locking dogs for preventing movement of the disk, said dogs having transverse grooves adapted to accommodate the flange to ermit of moven'ient of the disk when the ogs assume certain position in the casing and cams carried by the disks and adapted to be engaged by the key to so position the dogs as to dispose the transverse grooves thereof to accommodate the locking flange.

4. In a lock of the character described, a locking bolt, an actuating disk and motion transmission means between the actuating disk and the locking bolt, a locking flange carried by the locking disk and having notches at angular intervals, locking dogs engageable with the walls of the notches for preventing movement of the disk, said locking dogs having transverse grooves accommodating the locking flange in certain positions of the dogs to permit of movement of the disk, and cams carried by the locking dogs and adapted to be actuated by a key so as to position the dogs to dispose the transverse grooves therein in position to accommodate the locking flange.

In a lock of the character described, a locking bolt, an actuating disk and motion transmission means between the actuating disk and the locking bolt, a locking flange carried by the locking disk and having notches at angular intervals, and locking dogs engageable with the walls of the notches for preventing movement of the disk, said locking dogs having transverse grooves accommodating the locking flange in certain positions of the dogs to permit of movement of the disk.

6. In a lock of the character described, a casing having a chamber formed with an arcuate guideway and having a bolt seat, an arcuate bolt movable in said guideway and cooperable with said bolt seat, said casing having a second chamber adjacent said first chamber, an actuating disk operatively arranged in said second chamber, a link connecting the actuating disk and bolt, and key operated means for positively holding and positively securing the actuating disk in locked or unlocked position.

7. In a lock of the character described, an arcuate locking bolt, a rotatable actuating disk and means for transmitting the motion from the disk to the bolt and constraining the bolt to partake oi the motion of the disk, said means including a link having lateral trnnnions at its ends, the boll having a socket for the reception of one of the trunnions and having a transverse recess above said socket and an entering slot, the recess accommodating the link in its movement and the entering slot facilitating the assembly of the link with the socket, the disk having a socket for the reception of the other trunnion of the link and having a recess adjacent said socket for providing the requisite clearance to accommodate the movements of said link.

8. In a lock of the character described, an arcuate locking bolt, a rotatable actuating disk and means for transmitting the motion from the disk to the bolt and constraining the bolt to partake of the motion of the disk, said means including a link having lateral trunnions at its ends, the bolt having a socket for the reception of one of the trunnions and having a recess accommodating the link in its movement, the disk having a socket for the reception or" the other trunnion of the link and having a recess for providing the requisite clearance to accommodate the moven'lents of said link.

YANCEY Q. CALDWELL. 

